Self-winding electric clock.



U L sUNDBLAD SELFWINDING ELECTRIC CLOCK.

- APPLICATION FILED APR-5,19l5. 1,143,664.

" Patented June 22, 1915.

cusses an all whom it may concern Be it known that I, Use L. Sonomn, a citizen of the United States, residing at New i/Hnven, in the county of New Heaven and 1; State oi flonnecticut; have invented a new 'and useful Improvement in Self-Winding Electric Clocks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the charactors of reference marked thereon, to be a full, clear, rind exact description of the same and which, said drewingsoonstitute part of this application, undreprescnt, in-.

Figurel a front view of a self-winding electric clock constructed in accordance with my invention. Fig. 2 .a view in horizontal section showing a. plan view of the move ment and-motor. Fig. 3 c sectional view on the lineo b of Fig, 2, enlarged. Fig. 4 a.

broken sectional view on the line o-d of Fig. 3. Fig. 5 a similar view on the line 8-4 of Fig; 3. Fig. 6 o. rear view of the spring barrehwithits slide end ,dog detached, and shown inthc position when the spring is wound. Fig. 7 a similar view showing the position of 'theparts just before the dogis turned to open the circuit.

This invention relates to on improvement in self-winding electric-clocks, and, while useful for various purposes, is particularly adapted for use in connection with automobile clocks, the object being a simple orrangement of parts whereby a motor is actuatcd at intervals to wind the clock, the circuit through the motor being opened and closcd-hv the movement of the usual clock spring, dnd the invention consists in the constructi'on hereinafter described and particularly recited in the claims.

In carrying'out y invention I employ a usualclock mechanism which need not be describedother than to refer to the usual spring barrel 2 which contains a spring 3' one 'end ofwhich is fixed to the barrel Qgtnd the other, end to the main spring arbor 4. This spring barrel is formedwith an annu lar gear 5 meshin withm pinion 6 on the winding shaft 7 w ich in turn carries a gear wheel 8 meshing with a pinion 9' on the shaft 10 of an ordinary electric motor which will not be described other than to say that one side is connected with a. binding post 11 with which one wire from the battery, not shown, is attached, The other side of the motor is connected by a wire 12 with a post 13 mounted in abridge 14 and insulated therefrom.

specnc m of wh n new ret te June 22, icis. Application one, s in 5, 1915. Serial No. 19,174.

The bridge also carries a contrict disk 34: with which the post is connected, for the purpose as will hereinafter appear. A bind ing post 15 for the second wire of the hattcry is connected with the case 16 and through the case is grounded with the clock movement. Mounted on the rear face of the sprung barrel is-e slide 17 gnided'for move ment by a screw 18 passing through a clearonce slot 19. This slide carries an inwardly proJccting pin'QO which extends through a clearance slot 21 in the barrel and enters between the outer convolutions of the spring 3. Also pivotally mounted on the rear face of the barrel above the slide is a dog 22 carrying a contact pin 23 which extends rearward in the plane of the contact disk This dog has a tail 24 extending into line with a shoulder 25 on the slide 1? and so to he engaged thereb when the slide moves in one direction. harried by the slide is a. tripper 25 mounted on a spring 27, and this trapper is in line with the tail 24.- amd also in line with a cam 28 on the slide 17. The trip ,er is also adopted to engage with a notch or slot 32 formed in the spring barrel. The dog is also provided with two notches 29 and 30 adapted to be engaged bye spring detent 31.

in Figs. 4, 5 and 6 of the drawings, the spring pm 20 is drawn toward the center of the barrel by the contraction of the convov "in; Assuming the clock to be wound as shown spring unwinds the spring pin 20 is carried 7 toward the outer we of the spring barrel, and when the spring is unwound or nearly so, as shown in Fig. 7, the shoulder. 25

strikes the tail 24 of the dog 22 und'inoves it to one.s'ide and until the detent 31 engages ,j with tho notch 29. In this movement oi:

the slide the tripper 26 is carried with it until it engages with the notch 32 which then holds the slide in its so called retired position. By this movement of-tho dog the contact pin 23 has been turned into engagement with the contact disk 34 and hence the circuit through the motor is closed, and as soon as the circuit is closed the motor operutes to wind the spring through the winding shaft 7. In winding the spring pin 5:0 is gradually drawn toward the center of the barrel and in this inovement toward the center and at the time the spring is nearly fie to v the desired. point t spring barrel, of 20 rel, a contact rying a contact of the contact disk, and meansmoving with Wound, the ca1n28 engages with the tripper 26' and lifts it out of its notch 32 allowing the tripper linder the action of its spring 27 to snapforward, striking the tail 24 of the dog 22 and throwing the contact pin 23 out of engagement with the contact disk 34, thus opening the circuit and stopping the motor.

It will thus be seen that simple means are provided so that as soon as the spring is nearly run down the circuit through the tlon between the slide for turning said dog.

2. A self-winding electric clock, the comhination with a clock movement including a spring barrel, of an electric motor, connec-.

tion. between the motor and the spring harrel, a contact dish insulated-from the clock movement and connected with one side of the motor, a slide mounted on said spring barrel and carrying a spring pin extending into the convolutions of thespri'ng, said slide formed with a shoulder and with a cam, a dog pivotally connected with said spring barrel and having a tail extending between the said shoulder and cam, a spring tripper carried by the slide and extending into the path of the tail'iof the dog,'said dog carrying a contact pin extending into the path of the contact dlsk.

3. A self-winding electric clock, the combination with a clock movement including a spring barrel, of an electric motor, connection between the motor and the spring barrel, a contact disk insulated from the movement and connected with one side of the motor, a slide mounted on said spring bar rel, said slide formed with a shoulder and' with a cam, a dog mounted on said spring barrel and having a tail the shoulder and cam, said dog carrying a contact pin extending into the plane of the said contact disk, :1 spring detent for said dog, a tripper carried by said slide and adapted to engage with said spring barrel when moved in one direction and adapted to engage with the lifted by said cam out of engagement with the barrel.

UNO L. SUNDBLAD.

extending betweentail of the dog when 

